add implementation

1 files changed, 48 insertions, 0 deletions

diff --git a/include/cmmm/string-view.h b/include/cmmm/string-view.h
new file mode 100644
index 0000000..ef7a40c
--- /dev/null
+++ b/include/cmmm/string-view.h
@@ -0,0 +1,48 @@
+// include/cmmm/string-view.h --- simple string view library
+#ifndef INCLUDED__CMMM__STRING_VIEW__H
+#define INCLUDED__CMMM__STRING_VIEW__H
+
+// #define CMMM__STRING_VIEW__STRIP_VENDOR
+// #define CMMM__STRING_VIEW__SHORT_NAMESPACE
+
+#define CMMM__STRING_VIEW__LENGTH(SV) ((SV).end - (SV).begin)
+
+#define CMMM__STRING_VIEW__FMT "%.*s"
+#define CMMM__STRING_VIEW__FMTA(SV) (int) CMMM__STRING_VIEW__LENGTH (SV), (SV).begin
+
+struct cmmm__string_view {
+  const char *begin;
+  const char *end;
+};
+
+#ifdef CMMM__STRING_VIEW__SHORT_NAMESPACE
+#define CMMM__SV_STRIP_VENDOR CMMM__STRING_VIEW__STRIP_VENDOR
+
+#define CMMM__SV_LENGTH CMMM__STRING_VIEW__LENGTH
+
+#define CMMM__SV_FMT  CMMM__STRING_VIEW__FMT
+#define CMMM__SV_FMTA CMMM__STRING_VIEW__FMTA
+
+#define string_view cmmm__string_view
+#endif
+
+#ifdef CMMM__STRING_VIEW__STRIP_VENDOR
+#define STRING_VIEW__STRIP_VENDOR CMMM__STRING_VIEW__STRIP_VENDOR
+
+#define STRING_VIEW__LENGTH CMMM__STRING_VIEW__LENGTH
+
+#define STRING_VIEW__FMT  CMMM__STRING_VIEW__FMT
+#define STRING_VIEW__FMTA CMMM__STRING_VIEW__FMTA
+
+#ifdef CMMM__STRING_VIEW__SHORT_NAMESPACE
+#define SV_STRIP_VENDOR CMMM__STRING_VIEW__STRIP_VENDOR
+
+#define SV_LENGTH CMMM__STRING_VIEW__LENGTH
+
+#define SV_FMT  CMMM__STRING_VIEW__FMT
+#define SV_FMTA CMMM__STRING_VIEW__FMTA
+#endif
+#endif
+
+#endif // INCLUDED__CMMM__STRING_VIEW__H
+// include/cmmm/string-view.h ends here